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11/23/43
marked by the pulse every second is accurate to 0.000,01 second. The l-mlnute, 4-mlnute, and 5-rainute intervals, synchronized with the seconds, pulses and marked by the beginning and ending of the periods when the audio frequencies are off, are accurate to 1 part in 10,000,000.
Of the radio frequencies on the air at a given time, the lowest provides service to short distances, and the highest to great distances. For example, during a Winter day, good service is given on 5 megacycles at distances from 0 to 1,000 miles, 10 megacycles from about 600 to 3,000 miles, and 15 megacycles from about 1,000 to 6;000 miles. Except for a certain period at night, within a few hundred miles of the station, reliable reception is in general pos¬ sible at all times throughout the United States and the North Atlant¬ ic Ocean, and fair reception over most of the world.
Information on how to receive and utilize the service is given in the Bureau’s Letter Circular LC-645, Methods of Using Stand¬ ard Frequencies Broadcast By Radio, obtainable on request. The Standa.rds Bureau welcomes reports of difficulties, methods of use, or special applications of the service.
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RADIO TROQrMM NEWSPAPER ADS UP 442,597 LINES
While radio news space in the country’s newspapers is being steadily curtailed, according to a survey of Media Record figures of 12 cities for the first six months of this year made by the Billboard, radio program ads increased 442,597 lines over the same oeriod last year.
The trend, the article points out, is a repetition of what happened in both the railroad and the movie industries as they grew, and can possibly be accounted for in this case by the facts that more commercial programs are on the air today and competition between them is greater, resulting in heavy space buying. Also, Billboard suggests, films are making more use of radio and in many cases getting free time and talent in return for buying display ad soace on radio pages, which also increases competition.
The article concludes with the prophecy of an even larger increase ^ ^ ,
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